Free Online Sudoku
Levels include kids, easy, medium, hard, and evil
Solve the free online sudoku puzzle by filling in the empty cells with a single number (from all the possible candidates) that doesn’t violate Sudoku rules. There is only one correct number per cell. Scan the “givens” looking for the same number in different rows, columns, or regions. Eliminate cells for consideration by applying the Sudoku rules using these numbers.
In cases where the solution isn’t immediately obvious, you markup or pencil in a vacant cell the possible candidates for future reference.